Telescopic mast.



0. P. UVELY.

TELESCOPIC MAST.

APPLICATION man 1 58.28, me.

Patented Jan. 16, 191?;

0. P. LWEW.

TELESCOPIC MAST.

APPLICATION men rmzs. I916.

Patented Jan. 16, 191?.

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To concern: t

Be it tun that l", Orin P. "LY, a citizen of the United States, residing at Portsmouth, in the county of Norfolk and State of Vii-a, have invented certam new and use lmprovements in Telescopic ill/lasts, of which the following is a ecification I substantially round cross-section and with" its external or expo surface free'of obstructions; to provide, if'desired, a watertight support so asto protect the driving or operating mechanism from the actlon of the elements'ito provide simple, inexpensive and compact means for insuring the positlve ad Vance d positive return of the telescopic units, the same to elude, if desired, devices for reducing friction, such as ball bean ings or the like to provide a telescopic structure, which is automatically locked or gripped in any position to which it may be adjusted; and to provide a structure in which the telescopic units may be ordinary pipe motions so as to reduce the first cost as well as the cost of maintenance. I

While the resent embodiment was de-. signed especia y as an aerial-carryin mast to meet submarine requirements its utility is obviously not so limited.

The invention will first be described in connection with the accompanying drawings and will be finally claimed at the end hereof.

Figure 1 is a view principally in central vertical section of a telescopic mast embodying features of my invention, suficient of the shell and superstructure of asubmergible be' ing shown to indicate how the invention is app ed to e bm n r quire n Fig. 2 is a section on line 2-.2 of Fig. 1, to

show the spline or feather. connections whereby the telescopic units are extended or retracted without rotation of the exposed mas a t ons.- a 3 a s t n on line 33 of Fig. 1 to show the coupling devices tor insuring the ositive and PiQmiPt return socket member Y of the sections. Fig. 4 is a sectional viewof the mast in raised or extended position; and Figs. 5 and 6 are elevational views-of the mast. in respectively raised and lowered position. v v a, t, and c indicate, respectively, the shell plating, superstructure and fairwater ofa standard type of submarine. These parts are shown and referred to merely to indicate in a comparative way the location, and general dimension of the anchor or fixed mast section, which substantially houses the other sections when the mast is collapsed.

ile the drawings show four telescopic sections it is evident that'the number may vary according to the maximum extension desired, the load to be sustained, and upon other attendant conditions. The bottom sectionor standard lis rigidly mounted in a step or socket member 2, which to the shelllplating a. The" may be secured 2 has a central bore 3, which constitutes a guide bearin' for a driving spindle 4. The latter is equlpped with screw threads 5 so that it constitutes when turned in one or the other direction an elevating or lowering jack screw. The driving spindle t ranges axially of the mast section 1, is-suparrangement ported by a collar 6 bearing against the step 3, or, if desired, against a thrust bearing 7, and extends the desired distance below the shell plating so .as to lie-driven inany: a'p-- propriate way by hand or power, for ex ample by the hand crank 8..

' The movable telescopic sections are indi:

cated at 9, 10 and ll. As will be presently explained they are secured against rotation. The mast section 9 is directly drivenby the driving spindle d and the sections above it are driven indirectly by said spindle through the medium of complemental screw sleeves 12. It will be evident, however, that when the mast is being extended or retracted there is a substantially uniform or progressive feed since the driving spindle and its complemental screw sleeves are united for rotation by suitable spline or feather connec tionsand the internal diameters of the repec i e s rew s e v e a each to slide freely over the threaded surface at t ene t al er sl e e Ma t s e on 9 e e pes t e f ed ct 1 and is fo me 91 P v de ne its lower extremity With a tapped member or nut 13,

' clearly shown at 14, 18, 19 and 20 in Fig. 2,

whereby the mast sections proper are advanced or retracted 'without rotating, but without resisting the rotation of the sleeves 12.

Thetop mast section is provided with a summital part or cap 21 with ear s 22 for attachment of the aerial.

To protect the driving mechanism against the action of the elements and with the view.

of making the mast, particularly in the retracted position, watertight, I provide a water-shedding arrangement consisting of overhanging rims-or flanges 23, which are adapted and arranged to cooperate with packing provisions 24: at the exposed end of each section. So also there may be a stufiingbox connection 25 to insure watertightness where the driving spindle penetrates the shell plating.

In order to insure of a quick,- uniform and positive retraction of the telescopic units in responseto a retrograde movement of the screw, each'screw sleeve 12-is provided at its lower end with a collar '26 and with a .eircular path or recess above the same for the reception of a pin or key 28 secured in the opposite mast section. This,pin-and-slot arrangement constitutes a simple form of interlock, which is idle or of no eii'ect during 'the extension of the mast, but which beevenly distributed, each section assuming its sections, which will also materially re uce comes active under a retrograde. feed and insures the return of the parts in a simple yet positive way.

In addition to the thrust bearing 7, the thrust bearings -2 9'may be provided if necessary or desirable. I

It is evident that in a mast'constructed according to my invention all stresses are own share of the load and mutually supporting and aiding the others.

p The general construction of the parts and the type of drive also operate as an automatic lock to prevent the accidental quick closing of the sections. ,Moreover since the mast is substantially of round'cross-section it may be inexpensively constructed of ipe the cost of maintenance.

Having described the nature and objects of the invention, I claim 1. A support adapted for extension and retraction and capable of sustainingthe applicable load at any point within its range of movement, comprising telescopic outer sections, telescopic driving sections, splines connecting both sets of sections in pairs, and an actuator for the driving sections.

2. A support adapted for extension and retraction and capable of sustaining the applicable load at any point within its range of movement, comprising telescopic outer sections, telescopic driving sections, splines connecting mated sections, means for operating the driving sections, and means I for insuring the prompt return at the outer sec tionsin response to retraction of the driving sections.

3. A support adapted for extensionor retraction, comprising telescopic outer sections,

I telescopic inner sections, and positive means including spline connections for advancing or retracting both sets of sections without rotating the outer sections.

A A collapsible mast, comprising telescopic mast sections, telescopic driving sections contained within the mast sections, and a screw cooperating with said driving sections to raise or lower the mast sections.

5. A collapsible mast, comprising telescopic mast sections, telescopic drivingsections contained withinthe mast sections, a screw cooperating with the driving sections to raise and lowerthe mast sections, and splines to prevent rotation of the latter.

6. A collapsible mast, comprising telescopic mast sections, telescopic driving sections contained within the mast sections, an actuator connected with said driving sections, and means to insure the positive return of the mast sections.

7. A-collapsible mast, comprising the combination of a fixed support, a screw mounted for rotation therein, telescopic mast sections mounted relatively to the support so as to be housed thereby when retracted, and complemental telescopic driving sections contained within the mast sections and arranged for cooperation with the screw.

8. In combination with a support, an aerial carrying mast comprising a fixed section having a stufiing box connection with the support, a screw mounted for rotation in said fixed section and extending beyond the stufling box to a suitable source of power, telescopic mast sections adapted to be raised or lowered with relation to the fixed section, and means within said telescopic sections and cotiperating with the screw for ad vancing and retracting them.

9. A collapsible mast, comprising telescopic mast sections, telescopic driving sections contained within the mast sections, a

'screw cooperating with said driving sections to raise anddower the mast sections, and anti-frlction provisionsfor'taking the thrust of the screwand of said driving sections.

inmate 10. A collapsible mast, comprising tele- In testimony whereof ax my signature scopic mast sections, telescopic driving secin the presence of two witnesses. tions contained within the mast sections, a

screw cooperating with said driving sections URIN P. LIVELY, t to raise and lower the mast sections without Witnesses:

rotation of the latter, anoi watershed pro- FRANK 1L. Once,

visions for the joints. Esem PM cnnn. 

